And, the behavior is extensive!

When explorers first discovered the degree of promiscuity of penguins a long time ago, they decided to not report to the queen, as it would have shattered her image of the cuddly creatures.

Young male dolphins are known to also masturbate. But they also can team up, kidnap and sequester a female from another group, and take turns gang-raping her for days!

Though the physical apparatus differ in its construct, the subtle need for pleasure is pervasive. Animals only seem to align the needful to the pleasurable, by correctly observing ancestral pressure and engaging in sexual activity for procreation.